• Determine % H2O2 decomposed in first 500 s in a first order decomposition reaction of H2O2? k=7.30x10-4 s-1

Answers

Answer 1

Answer:

Given rate constant of the first-order reaction is:

K=7.30x10^-4 s-1

Time t=500s

Determine % H2O2 decomposed in first 500 s in a first-order decomposition reaction of H2O2?

Explanation:

The expression for the rate constant of the first-order reaction is:

[tex]k=\frac{2.303}{t} log \frac{ao}{a-x}[/tex]

where,

k=rate constant

t=time period

ao=initial amount of the reactant

a-x=amount of a remained after time t.

Substitute the given values in the above formula to get ao/a-x value.

[tex]7.30x10^-4 s^-1 = \frac{2.303}{500s} log \frac{ao}{a-x} \\log \frac{ao}{a-x} =7.30x10^-4 s^-1 * \frac{500s}{2.303} \\log \frac{ao}{a-x} =0.158\\\frac{ao}{a-x}=10^{0.158} \\\frac{ao}{a-x}=1.438[/tex]

% of H2O2 decomposed is:

[tex]\frac{ao}{a-x} = 1.438 *100\\ =143.8[/tex]


Related Questions

Please help, only a couple of days left!!!

Answers

Answer:

the heat from the universe during the big bang

a.k.a.

ITS A

Explanation:

the universe is still expanding, so what is gonna be used to create that new matter that's expanding the universe? energy and heat from the beginning of the universe! the universe started off as this point that was probably smaller than a quantum foam and infinite heat and started expanding from there

Bit bang has to do it with ut

Which of the following statements is true?

a. ΔHfus = ΔHsolid
b. ΔHfus = –ΔHsolid
c. Hfus is always negative.
d. ΔHsolid is always positive.

Answers

Answer:

c. Hfus is always negative.

Explanation:

Because energy is released when fusing solids

4. What is a renewable resource? List some examples.

Answers

Answer:

Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants).

five examples of renewable resources

Solar energy.

Wind energy.

Geothermal energy.

Hydropower.

Bioenergy.

I hope it help you

Answer:

The most popular renewable energy sources

currently are

Solar energy

Wind energy

Hydro energy

Tidal energy

Geothermal energy

Biomass energy

A + 2 B + 4 C → products is known to be second order in A, first order in B and independent of the concentration of C. What is the value of the rate constant for this reaction if its rate is 0.783 M · s−1 when [A] = 5.00 M, [B] = 7.00 M, and [C] = 3.00 M? −2 −1 Answerinunitsof M ·s .

Answers

Answer:

4.47 × 10⁻³ M⁻² s⁻¹

Explanation:

Let's consider the following generic equation.

A + 2 B + 4 C → products

This reaction is known to be second order in A, first order in B and independent of the concentration of C (zero order in C). The rate law is:

rate = k × [A]² × [B] × [C]⁰

rate = k × [A]² × [B]

where k is the rate constant

When the rate is 0.783 M/s, [A] = 5.00 M, [B] = 7.00 M, and [C] = 3.00 M, the rate constant is:

k = rate / [A]² × [B]

k = 0.783 M/s / (5.00)² × (7.00) = 4.47 × 10⁻³ M⁻² s⁻¹

Given the structural formula: This compound is classified as an

Answers

Answer:

A.) aldehyde is the answer

From the given structural formula, the compound is ethanamide and thus, belongs to the group of amides. Thus, the correct option is B.

Amide is a functional group of organic compounds having an acyl group (R-C=O) linked to amine group (-NR¹R² where R¹ and R² are hydrogen atoms or alkyl groups). The amide functional group is given as -CON= (not double bond with N, but two distinct single bonds).

Amides can be classified into the following types depending on the moiety attached to nitrogen other than the carbonyl carbon:

1. Primary amides - amide in which the nitrogen atoms is attached to two hydrogen atoms

2. Secondary amides - in which the nitrogen atom is attached to one hydrogen and one alkyl group.

3. Tertiary amides - in which the nitrogen atom is attached to two alkyl groups.

Learn more about amides in:

https://brainly.com/question/29595493

#SPJ2

Joelle is a manager at a construction company, and she is interested in the chemistry behind the materials they use. She has begun studying the materials used to fill walls. She knows that to keep the temperature inside a room steady the material must be a thermal insulator, and she predicts that materials should not be acidic or else they would dissolve too easily in water.

Which of these is a molecular ingredient that could be used in a wall-filling material ?

C27H36N2O10
Na6Ba6
NeNa
HCl

Answers

Answer:

a

Explanation:

A molecular ingredient that could be used in a wall-filling material is C₂₇H₃₆N₂O₁₀, is not a good thermal insulator, hence option A is correct.

The big molecule C₂₇H₃₆N₂O₁₀ is a poor thermal insulator. Since NeNa is a relatively reactive chemical, it would probably dissolve in water far too quickly. The acidic molecule HCl would dissolve far too quickly in water.

Not a good thermal insulator is C₂₇H₃₆N₂O₁₀. It is a big molecule composed of a lot of hydrogen atoms. Since hydrogen atoms are excellent heat conductors, they would be ineffective in stopping heat from passing through a material used to fill a wall.

Thus, the option (A) C₂₇H₃₆N₂O₁₀ is correct.

Learn more about thermal insulator, here:

https://brainly.com/question/23134662

#SPJ6

Use mathematics to prove that the 5.50 grams of salicylic acid (C7H6O3) used in this experiment is equal to 0.04 mol.

Answers

Answer:

Please find the answer to the question below

Explanation:

In chemistry, the following mathematical formula is used to calculate the number of moles contained by a substance:

mole = mass of substance (g)/molar mass of substance (g/mol)

Molar mass of salicylic acid (C7H6O3) = 12(7) + 1(6) + 16(3)

= 84 + 6 + 48

= 138g/mol

Mass = 5.50grams

mole = 5.5/138

mole = 0.039

Approximately, the number of moles of 5.5grams of salicylic acid is 0.04moles. This is in accordance with the mole value (0.04) given in this question.

An example of a product made from a synthetic material is
Question 5 options:

A)

a PET plastic water bottle.

B)

knitted wool socks.

C)

a cotton t-shirt.

D)

a pine 2×4 board.

Answers

Hi there! A simple answer and explanation is below :)

Answer:

A) PET plastic water bottle

Explanation:

Plastic goes through a manufacturing process before being used to make bottles for liquids like milk, soda, motor oil, and shampoo, as well as dry items like pharmaceuticals and nutritional supplements. Plastic is made up of a variety of organic polymers, including polyethylene and ethylene, in its unprocessed condition. In a soft state, plastic can be molded into the desired shape and then cast into a solid stat

Which of the following could possibly be true about a strong acid? (Check all that apply:).
It will completely dissociate (break apart) when dissolved in water.
It could have a pH of 6
It could have a pH of 13
Only a few of the acid molecules will dissociate (break apart).
It could have a pH of 2.
It could have a pH of 9

Answers

Answer:

it could have a pH of 2 it will completely dissociate when dissolved in water

an engineer chooses to use bamboo as a building material because it grows quickly and needs little space to grow. This is an example of?

Answers

Mark Brainliest please

Answer: This is an example of Green Design

Green design can be described as a method in which any building project is made by minimizing the harmful effects of construction on humans and environment. Green design is a sustainable design which is better for the economy too. In a green design, eco- friendly materials are used for construction works.
In the scenario discussed in the question, an engineer is using bamboo as a building material due to its eco- friendly features. Hence, it is an example of green design.

Answer:

A) This is an example of Green Design

Explanation:

What happens when an unstable nucleus undergoes radioactive decay?
A. Electrons change energy levels to balance the nucleus.
B. Energy is absorbed by the nucleus to make it more stable.
O C. Particles or electromagnetic radiation are emitted.
D. The nucleus increases in mass through radioactive decay.

Answers

i believe the answer is C. an unstable nucleus emits radiation and is transformed into the nucleus of one or more elements. i hope this helps!

Which question would most likely be studied by a biologist?
A.
How can a drug that treats cancer be synthesized?
B.
How can cancer-causing substances be regulated?
C.
How much ultraviolet radiation passes through the atmosphere?
D.
What causes cancer cells to grow uncontrollably?

Answers

Answer:

The correct answer would be - D. What causes cancer cells to grow uncontrollably?

Explanation:

A Biologist is a person that studies living organisms and the study of living organisms and their process called biology. Biology is a very vast field that involves many branches such as zoology, botany, biochemistry, immunology, biophysics, anatomy, ecology and many more.

So, given all are can be an example of the study biology wanted to do, however, the question most likely studied by a biologist would be What causes cancer cells to grow uncontrollably as it deals with an organism and their biological process.

WHAT HAPPENS WHEN ELECTRIC CURRENT PASSES THROUGH ACIDIFIED WATER.

Answers

Answer:

When an electric current is passed through acidified water, it decomposes to give hydrogen and oxygen gas. The hydrogen gas is obtained at the cathode and the oxygen gas is obtained at the anode

Which of the following best describes an electron transition?

A. An electron gains or loses energy and moves between continuous
energy levels.
B. An electron gains or loses charge and changes into a proton or a
neutron.
C. An electron gains or loses energy and moves between quantized
energy levels.
D. An atom gains or loses an electron and becomes an ion.

Answers

Answer:

A. An electron gains or loses energy and moves between continuous

energy levels.

Which defines the word planet?


A. A large body that revolves around the Moon.
B. A large body suitable for life.
C. A large body that contains water and land.
D. A large body that revolves around the Sun.

Answers

Answer:

I think it's D cause one of the requirements for a planet is that it has to revolve around a star

Which sequence of steps describes the life cycle of a lake?
A. Runoff fills a depression - sediments build up - water becomes
increasingly shallow
B. Runoff fills a depression - sediments are eroded - water becomes deeper
C. Runoff fills a depression - sediments build up
- water rises continuously
D. Runoff fills a depression - sediments are eroded - water spreads over a wider area

Answers

Answer:

The actual sequence of steps which describe the life cycle of a lake is given below:

C. Runoff fills a depression - sediments build up

- water rises continuously

Explanation:

This is because, the water which builds up as a result of the runoff water accumulating on the depression helps towards building up. When it must have accumulated greatly, it ends up forming a lake.

What does a vacuole mean

Answers


a small cavity or space in tissue, especially in nervous tissue as the result of disease.

Answer:

a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.

or

a small cavity or space in tissue, especially in nervous tissue as the result of disease.

Which is the best reason to carry out scientific research on climate change?
A. To help people prepare for the future
O B. To create jobs for scientists
C. To elect better-informed politicians
D. To win political debates

Answers

Which is the best reason to carry out scientific research on climate change?

A. To help people prepare for the future

B.To create jobs for scientists ☑️

C. To elect better-informed politicians

D. To win political debates

Answer:

to create jobs for scientists

Briefly explain why adding insulation to an attic helps reduce heating costs.

Answers

Answer:

Insulation reduces the exchange of heat through a surface such as a wall, attic, duct or roof. In a well-insulated home, less warm air escapes from the house during the winter, and less cool air escapes during the summer, reducing the amount of energy needed for heating and cooling

Sodium-22 has a 2.605-year half-life. If you begin with 1.570 grams of Na-22, how many grams are left after 1.00 year?

Type the correct answer in the box. Express your answer to the correct number of significant figures.

Answers

Answer:

1.20 grams

Explanation:

Correct on edmentum/plato

Answer: 1.20 grams

Explanation:

What is the delta H when 72.0 grams H2O condenses at 100.00C?

Here are some constants that you MAY need.

specific heats heat of fusion heat of vaporization

H2O(s) = 2.1 J/g0C 6.01 kJ/mole 40.7 kJ/mole

H2O(L) = 4.18 J/g0C

H2O(g) = 1.7 J/g0C



2930 kJ


163 kJ


-163 kJ


-2930 kJ

Answers

Answer: The value of [tex]\Delta H[/tex] is -163 kJZ

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

We are given:

Given mass of water = 72.0 g

Molar mass of water = 18 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of water}=\frac{72.0g}{18g/mol}\\\\\text{Moles of water}=4mol[/tex]

Calculating the heat released for the condensation process:

[tex]\Delta H=n\times \Delta H_{(vap)}[/tex] ......(2)

where,

[tex]\Delta H[/tex] = amount of heat released

n = number of moles of water = 4 moles

[tex]\Delta H_{(vap)}[/tex] = specific heat of vaporization = -40.7 kJ/mol

Negative sign represents the amount of heat released.

Putting values in equation 2:

[tex]\Delta H=4mol\times (-40.7kJ/mol)=-163kJ[/tex]

Hence, the value of [tex]\Delta H[/tex] is -163 kJ

How are liquid water, ice, water different from each other?

Answers

Answer: In liquid water, water molecules are moving faster. They are still close together, but they are no longer stuck in a rigid pattern as they are in ice. Water molecules in liquid water are constantly sliding past and bumping into each other; they keep moving from one place to another.

Answer:

they are different forms

Explanation:

ice is solid

and water is liquid

they also have different densities

Find the surface area of a square pyramid with side length 5 cm and slant height 4 cm.

Answers

Answer:

h = height

s = slant height

a = side length

P = perimeter of base

e = lateral edge length

r = a/2

V = volume

L = lateral surface area

B = base surface area

A = total surface area

Explanation:

Volume of a square pyramid:

V = (1/3)a2h

Slant Height of a square pyramid:

By the pythagorean theorem we know that

s2 = r2 + h2

since r = a/2

s2 = (1/4)a2 + h2, and

s = √(h2 + (1/4)a2)

This is also the height of a triangle side

Lateral Surface Area of a square pyramid (4 isosceles triangles):

For the isosceles triangle Area = (1/2)Base x Height. Our base is side length a and for this calculation our height for the triangle is slant height s. With 4 sides we need to multiply by 4.

L = 4 x (1/2)as = 2as = 2a√(h2 + (1/4)a2)

Squaring the 2 to get it back inside the radical,

L = a√(a2 + 4h2)

Base Surface Area of a square pyramid (square):

B = a2

Total Surface Area of a square pyramid:

A = L + B = a2 + a√(a2 + 4h2))

A = a(a + √(a2 + 4h2))

Consider the following intermediate chemical equations.
CH2(g) →C(s) + 2H2(g)
CC1.(g) → C(s) +2012(g)
H2(g) +C12(g) → 2HCl(9)
ΔH, = 74.6 kJ
ΔH2 = 95.7 kJ
ΔΗ =
ΔHg =-92.3 kJ
What is the enthalpy of the overall chemical reaction CH (g) +4012(g) → CCl4(h)+ 4HCl(g)?

Answers

Answer: The enthalpy of the overall chemical equation is -205.7 kJ

Explanation:

Hess's law is defined as the law which states that the total amount of heat absorbed or released for a given chemical reaction will remain the same whether the process occurs in one step or several steps.

In this law, a chemical equation is treated as an ordinary algebraic expression that can be added or subtracted to yield the required overall equation.  

The enthalpy change or heat of the overall reaction is the summation of the enthalpies or heats of the intermediate reactions involved in the process.

The given overall chemical equation follows:

[tex]CH_4(g)+4Cl_2(g)\rightarrow CCl_4(g)+4HCl(g);\Delta H^o_{rxn}[/tex]

The intermediate equations for the above reaction are:

(1)  [tex]CH_4(g)\rightarrow C(s)+2H_2(g);\Delta H_1=74.6 kJ[/tex]

(2)  [tex]CCl_4(g)\rightarrow C(s)+2Cl_2(g);\Delta H_2=95.7kJ[/tex]

(3)  [tex]H_2(g)+Cl_2(g)\rightarrow 2HCl(g);\Delta H_3=-92.3kJ[/tex]

According to Hess law, the enthalpy of the reaction becomes:

[tex]\Delta H^o_{rxn}=[1\times (\Delta H_1)] + [1\times (-\Delta H_2)] + [2\times (\Delta H_3)][/tex]

Putting values in above expression, we get:

[tex]\Delta H^o_{rxn}=[1\times (74.6)] + [1\times (-95.7)] + [2\times (-92.3)]\\\\\Delta H^o_{rxn}=-205.7kJ[/tex]

Hence, the enthalpy of the overall chemical equation is -205.7 kJ

A. 2 pts: In terms of conservation of mass, what were the results of each experiment (which one conserved mass and which one did not)?
B. 4 pts: PROVIDE a SPECIFIC explanation for "why" the results in both videos were different.
. 2 pts: Discuss differences in the experimental steps between the two videos (for example what was done in video one that was not done in
video two, why would this make a difference in conserving mass?)
• 2 pts: Look at both chemical equations (below for convenience), what difference in the type of products would have contributed to the
differences in why one conserved mass and one did not?
REACTION 1: Pb(NO3)2 (aq) + 2K1 (aq) --> 2KNO3 (aq) +Pölz (s)
• REACTION 2: NaHCO3(s) + CH3COOH(aq) → CO2(g) + H2Om + CH3COONa(aq)

Answers

Answer:

dftdffdgxrdfdrdxxxxdddddddddddddeeertdffddy

Tenisha solved the equation below by graphing a system of equations. help!!!!!

Answers

Answer:

(1.0, 1.4)

Explanation:

Graph the two equations [tex]\log_3 5x[/tex] and [tex]\log_5 (2x+8)[/tex]. The point of intersection is the solution to the system of equations.

Graph on Desmos:

[tex]\log_3 5x\implies \text{Red},\\\log_5 (2x+8)\implies \text{Blue}[/tex]

Explain why solids and liquids are difficult to compress
whereas gases can easily be compressed.

Answers

Answer:

Because they take up a certain amount of volume because there is no space in-between the particles, a gases can be compressed because there is alot of space in-between each particle

Explanation:

What is the pH of a solution?
O A. A measure of the strength of the acid
B. A measure of the buffering ability of the solution
O c. A measure of the hydrogen gas concentration
O D. A measure of the acidity of the solution

Answers

Answer:

D. A measure of the acidity of the solution

Explanation:

pH is a measure of how acidic or basic a solution is, and is measured on a scale from 0-14, where 7 is neutral, anything less than 7 is acidic, and anything more than 7 is basic.

Which of the following statements is correct about electrical insulators?
A. They do not contain any atoms.
B. Their protons are not allowed to move about freely.
C. The electrons are not able to move about freely.
D. They are good at conducting heat only.

Answers

Answer:

the answer is C in my opinion.. hope this might be helpful

if five elements have atomic numbers 2,3,6,9 which two numbers are the most reactive??​

Answers

Explanation:

[tex]element \: with \: 2 \: atomic \: number \\ \\ is \: stable \: because \: it \: has \: already \: \\ \\ completed \: its \: orbit \: \\ \\ but \: atomic \: number \: with \: 3 \: and \: 9 \\ \\ will \: have \: to \: become \: stable \: \\ \\ after \: giving \: one \: electron \\ \\ so \: \: element \: with \: 3 \: and \: 9 \: atomic \: number \\ \\ is \: most \: reactive[/tex]

Other Questions
At the store, Alyssa spent $3.25 on stickers and $6.50 on candy. She paid with a $10 bill. How much change did she get back? excerpt from frankenstein by mary shelly Place the paraphrases in the correct logical order to a summary.The narrator says he is afraid to go but isexcited at the same time.The narrator shares that it is hard work,but he loves the adventure of the seas.He shares that it will be dangerous, but heis attracted to the mystery of it all.The narrator explains that he cannot fullydescribe how he is feeling.He will travel to new, unknown areas likean old seaman does. I need this by to night somebody help pls A Lewis Dot Structure shows only valence electrons.A. TrueB. False What is the area of the shaded region? Use 3.14 for pi. Jose, 7 years old, and his mother live alone in a one-bedroom apartment close to his school. Most afternoons Jose walks home alone, lets himself into their apartment, and watches television until his mother comes home from work. His favorite after-school snack consists of potato chips and a soda or fruit drink. For dinner, Jose's mother usually brings something home from a local fast food restaurant because she is "too tired to cook." She knows this isn't good for either one of them. Jose's mother is currently being treated for high blood pressure, and the pediatrician has expressed concern about Jose's continued weight gain. However, Jose's mother doesn't see how she can change anything given her work schedule and limited income. question : if you are working with family, what suggestions would you have for improving their health? Question 1Consider the ratio of 153 per 108. Write this ratio in different forms below.A ratio written as a reduced fraction 17/12A ratio written as a decimal rounded to the hundredths II0(14) What is the perimeter of the area. Please show work. You are employed by Company A, which makes motorcycles. You have been asked to write a brief report (following a report format) to the Managing Director comparing the size of your company with three others in the same industry. Use the following information in your report. State the advantages and disadvantages of each of the ways of comparing business size. workers employed capital employed($ million) profit($ million) sales($ million)Company A 20,000 50 10 100Company B 5,000 150 5 200Company C 3,000 60 20 150Company D 15,000 180 15 150 1 4.3.3 Test (CST): EmergenciesQuestion 7 of 20Which of the following is the clearest indicator that someone who is chokingdoes not yet require first aid?A. They are able to continue coughing.B. They are able to respond to yes or no questions by nodding.C. They are not pointing to or clutching their throat.O D. They are able to make sounds and continue coughing.SUBMIT i need help with this asap If f(t) = 3t4 + 5t+8, what is the value of f(-2)? Your elder brother who looks after you has threatened to withdraw you from school because of your poor performance.Write a letter to him giving at least three reason for your not doing well.Naswer 450 words write the ratio 14:56 in the simplets form the algebraic form of the sum of n terms of an arithmetic sequence is 3n2 + 5 n .what is the common difference ? Experts believe the rate of obesity (defined as having a BMI greater than 30) of adults in the United States is approximately 24.5%. A Gallup poll examined the rate of obesity in adults in the United States with a survey of 86,664 randomly sampled U.S. adults. Of the adults surveyed, 23,053 said that they were obese. Select the best description of the sample. find the mean of 11,7,2,8 Under a job-order costing system, the dollar amount transferred from Work in Process to Finished Goods is the sum of the costs charged to all jobs: in c the square root of a number N can be approximated by repeated calculation using the formula NG = 0.5(LG + N/LG) where NG stands for next guess and LG stands for last guess. Write a function that calculates the square root of a number using this method. The initial guess will be the starting value of LG. The program will com- pute a value for NG using the formula given. The difference between NG and LG is checked to see whether these two guesses are almost identical. If they are, NG is accepted as the square root; otherwise, the next guess (NG) becomes the last guess (LG) and the process is repeated (another value is computed for NG, the difference is checked, and so on). The loop should be repeated until the difference is less than 0. 005. Use an initial guess of 1. 0. Write a driver function and test your square root function for the numbers 4, 120. 5, 88, 36.01, 10,000, and 0. 25PLEASE N C PROGRAMMNG What is the conversation of energy